Combined paper-feed and finger-releasing mechanism



June 10,1924. 1,496,876

M. GARBELL COMBINED PA PER FEED AND FINGER RELEASING MECHANISM "FiledDec. 13. 1920 2 Shasta-Shoot. 1

June 10 1924.

' M. GARBELL COMBINED PAPER FEED" AND Fiuesg RELEASING? MECHANISM FiledDec. 1;. 1920 2 shuts-she 2 Patented June 10, 1e24,.

MAX GABBELL, OF CHICAGO,

JENNINGS & COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS,ASSIGNCR, BY MESNE ASSIGNMENTS, TO 0. D.

ILLINOIS.

COMBINED PAPER-FEED AND FINGER-RELEASING NIECHANIS'M.

Application filcd December 13, 1920. Serial No. 430,214.

This invention relates generally to type-' writing machines, and hasparticular relation to improvements in the construction and arrangementof the paper supporting table or platform, the feed and guide pressurerolls for the paper, associated with the platen, of-the front-striketype of writing machines, and it consists in certain pecuharities of theconstruction, novel arrangement and combinationof the various partsthereof as will be hereinafter more fully set forth and specificallyclaimed.

The invention has for its principal object the production of a mechanismof the above named type having the qualities of all adaptability that isrequisite in View of the various positions, and thicknesses of the paperfor which it is used, for convenience in inserting, adjusting andwithdrawing the sheets, for obtaining a more comprehensive control ofthe pressure rolls or means, and

the possibility of economical manufacture.

In carrying out the above named objects, one feature of the lnventionconsists 1n employ ng a construction, in which overhead pressure rollsor means for holding and and presguiding the paper on the platen, surerolls or means for feeding the paper, mounted in front and-rear, butbelow the platen, are used, whereby both the overhead and lower pressuremeans can be controlled by the same instrumentalities and operation.

Another feature is to provide at the rear lower portion of the platen,floating or selfad ustmg pressure means, or a roll, which shall haveindependent tensioning means p with said rails and is provided-at itsfront.

from that of the lower front rolls or pressure means, and from that ofthe upper or' of which Various other novel features and objects of theinvention will become obvious from the following description andexplanation.

In the accompanying drawings, which serve to illustrate an embodiment ofthe .invention Fig.1 is a front face view of the carriage frame of atypewriter, showing my improvements mounted thereon and illustratingfragments of the supporting frame for the carriage frame in section. i r

Fig. 2 is an end View of like parts.

Fig. 3 is a greatly enlarged sectional View taken on line 3-3 of Fig. 4looking in the direction indicated by the arrows, showing a portion ofthe platen, a part of the paper table or platform, and a portion of therear pressure feed roll showing the manner in which the same is mountedand actuated.

Fig. 4 is a transverse sectional w iew taken on line l 1 of Fig. 1vasindicated by the arrows, illustrating the parts of the mechanism intheir normal positions, and

Fig. 5 is a similar View taken on the same? line but illustratingthe-parts locked in their released positions. 2

Corresponding numerals of l reference designate like parts throughoutthe different views of the drawings. 5

The platen 8 of the mechanism, is mountedfor rotation, by means of ashaft 9 thereon in and between'the end pieces 10 and 11 of the carriageof the machine, which pieces may be connected together at their lowerportions by the carriage rails 12 and 13 on which the end plates orpieces may besecured in an upright manner near the ends of.

said rails. in any suitable way. The shaft 9 of the platen may have oneach of its ends a knob 1 1 by means of which the platen can be rotatedwhen desired.

The-carriage frame rails 12 and 13 are connected together in parallelspaced relation withone another by means of a tie late 1 1 which issubstantially co-extensivc the inner surface of the rail12 by means ofscrews 16 engaging suitable openingsin said rail'a'nd lock nuts 17 onsaid screws. That portion of'the tie plate or bar 1 1 opposite theextensions is secured to the lower portion of the rail 13 in anysuitable manner and by preference has a reduced extension 18 projected aslight distance outwardly from the outer surface of the rail 13 for thepurpose to be presently explained. As shown, each of the rails 12 and 13is provided on its outer surface with an angular race-way 19 for thereception and operation of anti-friction balls 20 which are located inlongitudinally disposed angular race-ways or grooves 21 formed in theinner surface of each of the carriage rail supports 22 and 23 whichsupports are in the form of rails and are horizontally mounted inparallelism with one another, at sufficient distances apart to embracethere-between the rails 12 and 13 of the ca riage frame and theantifriction balls 20.

A tie plate or frame including parallel spaced rails 24 and 24 extendedtransversely under the rear portions of the end pieces 10 and 11 of thecarriage frame, and cross bars 25 uniting the rails 24 and 24 near theirends and extended forwardly and slightly downwardly from the rail 24,supports the carriage rails 22 and 23 and said tie plate or frame is bypreference located on adjustable screw-posts 26 seated on the upperportion of the main supporting frame of the machine at the rear andfront ends thereof.

As shown in Figs. 4 and 5 of. the drawings, the upper surface of therail 24 is provided with a longitudinally extended recess 28 into whichthe projection 18 of the tie bar or plate 14 is extended and the frontsurface of the rail 23 overhangs said re cess, by which arrangement itis evident that upward movement of the carriage rail 13 willb'eprevented.

Journaled at its ends in the lower front portions of. the end pieces 10and 11 is a rocker bar 29, and journaled at its ends in the upper rearportion of said end pieces is another rocker bar 30 which serve to assist insecure'ly' uniting said end pieces and which are by preferenceangular" in crosssect-ion except at their ends, which are cylindrical inorder to fit in correspondingly shaped openings in the end pieces 10 and11. to permit of rocking movement of said bars.

At one end of the bar 29 a spring 31 is coiled there-around and has oneof its ends connected to a fixed support, in the present instance to thetie bar or plate 14, and its other end in engagement with an arm 32fixedly'mounted on the bar 29 and extended inwardly thereof between theend plate 11 and the endof the platen adjacent thereto. Mounted on thebar 29 so as to turn therewith, and by preference, for longitudinaladjustment thereon, is a pair of spaced paper holding or guiding fingers33 which may be of any suitable material, but by preference of flexiblesheet metal. fingers are substantially segmental in shape and each ofthem has near its free end a pair of outwardly extended ears 34 betweeneach pair of which is journaled a rubber or rubber tired roll 35 topress or hold the paper against the front upper portion of the platen inthe operation of the machine, for it will be seen and understood thatthe fingers are vertically mounted on the rockerbar 29 in front of theplaten in such a manner as to cause the rollers 35 which they carry tooverhang or overlie the platen. The ears 34 are preferably punched outof the upper portions of the fingers 33, thus providing an opening 36 ineach of the tingers through which portions of the rolls will extend tocontact with the paper or platen.

Mounted on the shaft or bar 30 so as to turn therewith, is a paper tableor shelf 3'? which is by preference made of resilient sheet metal andsubstantially S-shaped in cross-section as shown. This table or shelfconstitutes a part of the paper feed and extends somewhat above andrearwardly of the bar 30 on which it is mounted, and also extendsdownwardly and forwardly and then upwardly near the lower surface of theplaten. The table 37 is provided in its front lower portion, or near itsfront edge, with a pair of longitrulinally elongated openings 38 whichare aligned and spaced at their adjacent ends. At each end of each ofthe openings 38 the table is provided with a depending aperture'd ear orbracket 39, which are by preference integral with the table. Journaledon each pair of the cars 39 is a rubber or rubber tired pressure roll 40a portion of each of which extends through the openings38' su'fiicientlyto contact with the paper or platen when the table is properlypositioned in the operation of the machine. Rearwardly of the openings38' the table 37 is provided with another opening 41 which is" extendedlongitudinally in parallelism with the openings 38 and may be of anydesired length. At each end of the opening 41 the table 37 is providedwith a depending ear or bracket 42 each of which has therein an upwardlyextended slot 43, which slots are for the reception of stubshafts 44 ontheends of a rubber tired roller 45, which is so mounted on the ears 42as to extend slightly through the opening 41 so asto contact with thepaper and. lower portion of the platen in the operation of the machine.7

Fixedlyunounted on the rocker-bar 30 near the end plate or piece 11 ofthe car-- riage frame is a downwardly and forward ly extended arm 46which has atits front or free end a laterally extended lug 47 adaptedfor engagement with an arm 48 of a double bell-cranlc-lever which leveris des- These ignated as a whole by the numeral 49 and is journaled onthe shaft 9 of the platen near the inner surface of the end plate 11 andpreferably at the right hand side of the machine. This lever consists ofthe arm 48 which extends upwardly and rearwardly, the actuating arm orlever 50, which extends upwardly and, forwardly from the shaft 9, andanother arm 51 which extends downwardly and forwardly from said shaft.The arm 51 is provided with a cam slot 52 for the reception andoperation of a lateral projection 53 on the arm 32 near its inner or'free end.

As shown,the actuating lever or arm 50 of this double bell-erank-leverextendsbeyond' the periphery of the platen and by preference has itsupper portion flattened to provide a finger or thumb rest when it isdesired to actuate the various parts so as to release the pressure rollsfrom the platen or paper, which may be done by pressing the lever 50rearwardly.

Secured to the front surface of a bracket 54 extended upwardly from thecarriage rail 13 is a depending spring 55 which rests at its lowerportion against the rear surface of the table 37 and is employed tonormally hold said table and thepressure rolls which it carries in aboutthe position shown in Fig. 4 of the drawings.

By reference to Figs. 3 to inclusive of the drawings, it will be seenand understood that the tie plate 14, is located at-some distance belowthe lower portion of the table 37 and that said plate has mounted on itslower surface outwardly of the stub shafts 44 of the roller at each endof said roller an inwardly extended spring 56, each of which has itsinner or free end upturned as at 57, and provided with prongs 58,between which the stub shafts 44 will rest. By this arrangement, it isapparent that the roller 45 will be supported in such a manner as to beself-adjusting, for instance, assuming that the roller 45 occupies theposition shownin Fig. 4 of the drawings and it is desired to insertpaper between said roll and the platen, this can be done by placing thelower ends of sheets of papers between the rear faces of the roller 45and the platen, when by turning the latter, it is apparent that thesupporting springs 56 on the tie plate will yield sufficiently to allowthe paper to be fed forwardly, the slots 43 in the ears 42 of the tablepermitting of such movement without movement of the table.

The operation of the device is as follows:

Assuming that the parts are in the positions shown in Fig. 4 of thedrawings, and it is desired to release the various pressure rolls ormeans from the platen, so as to properly position the paper on the same,it is only necessary to apply slight rearward pressure to the actuatinglever 50, which action will cause the roller or projection 53 on the arm32 of the rocker shaft 29 to ride upwardly a slight distance in the camslot 52, which operation will release the pressure of the guiding orfinger rolls 35 by reason of the fact that the arm 32 will be movedupwardly against the action of the spring 31, thus rocking the shaft 29and thereby causing the fingers 33 to be moved forwardly of the platen.

In the above mentioned operation, it will be understood that by furtherrearward movement of the actuating lever -the roller or pro ection 53will pass over the apex 52 in the lower wall of the'slot52 and assumethe position shown in Fig. -5 of the drawings. As the actuating lever 50:is pressed rearwardly, as above mentioned, itis manifest that the arm48 of the double bell-cranklever will contact with the projection 47 ofthe arm 46 on the rocker shaft 30 and thus cause the table 37 to bemoved away from the platen, and when the actuating lever 50 has reachedthe limit of its rearward movement, as shown in Fig. 5 of the drawings,the feeding pressure rolls, as well as the guiding rolls 35, will belocked in their released positions. To cause the rolls to again assumetheir normal positions, slight forward pressure may be applied to theactuating lever 50, or to one of the fingers 33, for an instant, andthen removed from said lever or finger, when by reason of the tension ofthe springs 31 and 55, the parts will be reinstated in their normalpositionsQ From the foregoing, it will be understood that the releasingmovements of the rolls or pressure means 35, the pressure means 40, andthe roll 45 will be effected in sequence or in succession as named, butin such a way that their release from the platen will be accomplishedalmost simultaneously and that after their release from the platen theywill all be held or locked in their released positions, thus enablingpaper to be placed in position and easily and properly adjusted withrespect to the platen.

Having thus fully described my invention, what I claim as new and desireto secure by Letters Patent is 1. In a device of the class described,the combination with a platen, of a plurality of pressure rollsco-operating therewith, independently operable resilient support forsaid rolls, means for actuating said supports to release said rolls fromcontact with said platen and for locking said supports in said lastnamed position, said means including a lever rigidly connected to eachof said supports, and another lever directly engaging both of said firstmentioned levers to actuate the latter and the supports independentlyand in sequence.

2. In a device of the class described, the combination with a rotatableplaten, of a each side of the platen, a lever rigid with each ofsaidsupport's and extended inwardly therefrom, a lateral projection onone of said levers, an actuating double bell-erank-lever operativelymounted between said levers and having in one of its arms a cam slot forthe operation of said projection on one of said levers and another armadapted to contact with the other lever or the supports.

3. A device of the class described, including in combination with arotatable platen a paper table extended forwardly under the platen andhaving in its lower portion an elongated opening, a rocking support forsaid table, said table having at each end of the opening therein adepending bracket each provided with an upwardly extended slot, a rolljonrnaled in the slots of said brackets, a leaf spring suitablysupported near each end of the said roller and independently thereof andeach provided with a forked bearing tor the reception of the journals ofsaid roller.

4. In a paper teed device for typewriting machines having a platen, theeon'ibination with a margin clamp resiliently and inclependentlynormally held against the platen,

of a paper table normally independently yieldii'igly movable toward theplaten; a lower front feed roll normally engaging the platen; and alower rear feed roll, one of said teed rolls being supported by and adjustable in unison with the feed table relatively to the platen, theother feed roll being normally yieldingly held to the platen and movableaway therefromindependently of the table and of said roll supported bythe table.

5; In a paper feed device-for typewriting machine's having aplaten, thecombination with a margin clamp resiliently and independently normallyheld against the platen; of a paper table normally independentlyyieldingly movable toward the platen; a lower front feed roll normallyengaging the platen; a lower rear feed roll, one of said feed rollsbeingsupported by and adjustable in unison with the feed table relatively tothe platen, the other feed roll being normally yieldingly held to theplaten and movable away therefrom independently of the table and of saidroll supported by the table; and means for moving said margin clamp,table and rolls away from the platen and to lockthem indisengagedgposition.

MAX GARBELL.

